It's Joshu because Joshua is usually taken -- and because Joshu was a 7th century Zen Buddhist master, the comparison of which to my anxiety-ridden self makes me giggle.
Yeah, I meant, I'm sorry, not "you should pick a better nick".
I don't need to look up that market makers are dealers. :)
I have a weirdly low-level perspective on markets for weird reasons; I'm fascinated by the kind of stuff you worked on at MS, but still picking it up. Ironically, the iceberg stuff is directly relevant to what I actually do get to do with this stuff.
Broker-dealer is also defined. http://en.wikipedia.org/wiki/Broker-dealer